Accession Number : ADA554092


Title :   Metal Whiskers: A Discussion of Risks and Mitigation


Descriptive Note : Briefing charts


Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GREENBELT MD GODDARD SPACE FLIGHT CENTER


Personal Author(s) : Brusse, Jay A ; Leidecker, Henning ; Panashchenko, Lyudmyla


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a554092.pdf


Report Date : 30 Nov 2010


Pagination or Media Count : 50


Abstract : Metal coatings, especially of tin, zinc, and cadmium, are unpredictably susceptible to the formation of electrically conductive, crystalline filaments referred to as metal whiskers. The use of such coatings in and around electrical systems presents a risk of electrical shorting. Examples of metal whisker formation are presented along with a discussion of optical inspection techniques to improve the probability of detecting them. In addition, the briefing charts describe the failure modes associated with metal whiskers (i.e., electrical shorting behavior) and the benefits of polyurethane conformal coatings, like Arathane 5750, to protect electrical conductors from whisker-induced short circuit anomalies.


Descriptors :   *ELECTRICAL PROPERTIES , *INHIBITORS , *METAL COATINGS , *OPTICAL DETECTION , *PROTECTIVE COATINGS , *SHORT CIRCUITS , *WHISKERS(CRYSTALS) , BUCKLING , CADMIUM , ELECTRIC CONDUCTORS , ELECTRICAL EQUIPMENT , FILAMENTS , INSPECTION , POLYURETHANE RESINS , PREVENTION , RISK , SYMPOSIA , TIN , ZINC


Subject Categories : Coatings, Colorants and Finishes
      Plastics
      Optical Detection and Detectors
      Crystallography
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE